Lexus has turned its already fast IS F over to the go-fast guys at Toyota Racing Development. The finished product is the IS F Circuit Club Sport, and the sport sedan wears a wide range of aero and mechanical improvements. We’ve known this model was coming for some time thanks to a 2010 Tokyo Auto Salon concept and details spouted late this summer, but these photos provide our best look yet at this touring-car-like model.

Outside, engineers have fitted the IS F with a new front spoiler, rear diffuser and hood, all of which are fabricated from weight-saving carbon fiber. You may have also noticed the vehicle’s sizable rear wing. A performance damper kit is also part of the package, offering buyers two separate settings that independently adjustable compression. The luxury bruiser also comes equipped with lightweight forged aluminum wheels, though magnesium rollers are also available.

Mechanically, the IS F Circuit Club Sport Package utilizes a TRD limited-slip differential as well as a TRD big brake kit. At this point, there’s no word on how much the package will cost or when it will be available. We aren’t even sure American buyers will be able to sink their teeth into the factory-bred racer, so stay tuned.